Electromagnetic well-drilling machine



F. R. STOLL.

ELECTROMAGNETIC WELL DRILLING MACHINE. APFLICATIOVN man 1uLY25, 192i.

Patented Sept. 26, L922 3 SHEETS-SHEET 2- Q5 [0 ZZ',

WITNESSES; ATTORNEY F. R. STOLL.

ELECTROMAGNETIC WELL DRILLING MACHINE.

APPLICATION FILED JULY25. 1921.

1 430 73, PatentedSept. 26, 19221.

3 SHEETSSHEET 3.

JZres 2'76. 15237 wrrmzssss 1 I ATTORNEY Tetented Sept, 26, i922 UNHTEQ STATES renynsr n. sromz, or CAREY, omo.

MECTROMAGNETEC VV'JELL-DRIIILING MACHINE.

' Application filed. July 25,

To all whom it may concern:

Be it known that I, F OREST R. S'roLL, a citizenef the United States, residin at Care in the county of'Wyandot and tate of 0 i0, have invented new and useful llmprovements in Electroma netic Well-Drilling Machines, of which the following s a specification. L

The object of my present invention is the provision of an improved electromagnetic well drilling machine capable of eflicient operation at a high rate of speed, susceptible of being controlled by one operator, and adapted to be conveniently transported or moved from place to place. a

To the attainment of the foregoing, the invention consists in the improvement as hereinafter described and definitely claimed.

In the accompanying drawings, forming part of this specification:-

Figure 1 is a vertical sectional view illustrating the machine constituting the best practical embodiment of my invention of which I am aware.

Figures 2 and 3 are enlarged detail views of the switch mechanism comprised in the machine. l

Figures 4 to 8 are enlarged views of detail features of the machine;

Figure 9 is a'dia rammatic view illustrative of the electrica connections complementary to the machine. 1

Similar numerals of reference designate corresponding parts in all ofthe views of the drawings.

Among other elements my novel machine comprises a c lindrical metallic shell or casing 1 which is preferably made in sections,

jointed at 2. The head 3 at the upper end of the casing 1 is equipped'with a stufing box 4, and at the lower end of the casing is a stufling box 5, lugs 6 to secure the said studing box 5, and a shield 7 over the said stufiing box 5. It will also be noticed that the lower end ortion of the casing 1 is equipped with uprig t shoes 8 the outer faces of which are convex in vertical section so as to enable the shoes to guide and facilitate endwise movement of the casing in a drilled hole.

lnteriorly the casing 1 is provided at a pointy adjacent to its lower, end with a bracket 3,

and adjacent to its transverse center the easing is provided "with a stop block 10.

upported in the "upper portion of the casing l 1s a solenoidll the armature rod of which is designated 12 andis preferably of 1921. Serial 1170. 487,511.

iron. The said rod 12 or another rod permanently oined thereto is carried upwardly through the stufiing box 4 and is connected at its upper end with lever mechanism'l3 to extion means 16 of a hoisting cable 15. At 18 the head 3 of the casing 1 is provided with a water pipe-slip connection through which extends a cable 19; the said cable containing wires in proper electrical connection with the solenoid 11 and a source of electric 'energiy 20 as shown in Figure 9.

he slip connection referred to permits of the cable 19 being pulled upwardly with respect to the casing 1 when desirable. Manifestly when the machine is suspended in a 1 drilled hole by the cable 17 and current is supplied to the solenoid ll said solenoid will operate to raise the armature rod 12 with the result that ,through theupper portion 12 oftherodfwhich portion 12 is preferably of brass, the shoes 14: will be held under pressure against the wall of the well and in consequence turning of the machine in the well will be practicallyprecluded. The solenoid 11 is electrically connected through a cable 20 with a main contact .2 1 of an electrical switch best shownin 'lF'iguresil and 3.

The said switch also includesterminals 21,

22 and 23 together with a brush 24:, preferably of carbon. Arranged in the lower portion of the casing 1 is a solenoid 30 the armature'rod 31 of which is preferably of iron and is joined to a lower steel stem 32 through the medium of an inter osed brass section 33. Said section 33 is mterp'o'se'd between the-iron rod 31 and the steel stem 32. Atits upper end the rod-like armature 31 is joined to a brass sleeve 34 in which are apertures 35 to relieve compression as hereinafter described. With the electrical connections arranged as illustrated it will be .observed'that .current passes from the solenoid 11 through the connection 20 to the main contact or I terminal 21 of the switch, provided the drill is incontact with thebottom of the well and the carbon brush 24 is in contact with the terminal 22, and the drill will-be operated. When the drill is not being loweredto-a sufiicient extent the flange 40 on the sleeve 34f will rest on the stop block 10'which willg-p'ut the carbon brush 24 in contact with the 'ter-' mine]. 23 and which is grounded as shqwn.

Therefore, inasmuch as the negative brush or the dynamo 4L1 is also grounded through an electric signal 42, the current will pass from the terminal 23 through the ground and the signal through the negat ve brush of the dynamo. On suilicient lowering of the machine a spring 50 will operate to move the carbon'brush 24L back into contact with the terminal 22 whereupon current will pass through a cable 51 and the upper coil 52 of the solenoid with the result that the armature 31 will be moved upwardly until the flange 4:0 strikes the switch operating arm 80 which .will operate to raise the carbon brush- 24L until it comes in contact with the-terminal 21. whereupon current will pass thrguglh t e the cable 70 through the lower coil 71 o solenoid 30. This energization of the lower coil 71 in cooperation with the iron armature 31 will move the armature suddenly and powerfully downwardly with the result that theclrill 80 at the lower end of the stem 32 will strike a hard blow, and this operation is repeated so long as current is supplied.

At 81-is a steel rod, of square form incross section having a twist of about 2% degrees. This rod 81 slides in the sleeve 34: or rather in the square hearing at the top of said sleeve. Therefore, when the drill stem 32 is raised, the rod 81 will be turned, and when I the drill stem is moveddownwardly the rod 81 will be prevented from turning .by the ratchet wheel 82 in cooperation with a spring pressedpawl 83 the said ratchet wheel 82 being fixed on the upper end of the rod 81, and the pawl 83 being carried by the casing 1. From this it follows thatthe drill will be turned ste by step as is desirable.

While prefer to employ a cruciform or four wing drill ll would have it understood that it is within the purview of my invention to employ 'a drill of any description compatible with the purpose of my invention.

l have entered into a detailed description of the construction and relative arrangement of parts embraced in the present and preterred embodiment of my invention in order to impart a full, clear and exact understanding of the said embodiment. T do not desire,

however, to be understood as confining myself to the said specific construction and relative arrangement of parts inasmuch as in the future practice of the invention vari ous changes and modifications may be made such as fallwithin the scope of my invention as defined in my appended claims.

llllavin described my invention, what ll claim an desire to secure by Letters-Patent, 1s:

l; The comhinationin a drilling machine,

2 of a casing, a solenoid in the upperportion thereof, means to supply electric current to thesolenoid, a hoisting bail on the casing,

f shoes hingedly' connected to said bail, an armature rod complementary to the solenoid Lea ers and contract said shoes.

2. The combination in adrilling machine, of a casing, a sqlenoid in the upper portion thereof, means to supply electric current to the solenoid, a hoisting bail on the casing, shoes hingedly connected to said bail, an armature rod complementary to the solenoid and means operable by said rod to expand and contract said shoes;- said means including a rod section on the armature rod and lever connections between said rod section and the-shoes.

3. In a drill, the combination of a casing having a head equipped with a stulling box and a slip connection, a solenoid arranged in the casing, a hoisting. bail connected to the casing, jaws hingedly connected to the hoisting bail, a cable containing electric wires and extending through the slip connection and connected to'the solenoid, an armature rod complementary to the solenoid and having a,

casing, an armature complementary to the solenoid and arranged therein and connected with the stem, a sleeve connectedwith the said armature and having a square bearing in its upper end, a square twisted rod dis posed in the said bearing, a ratchet wheel on said rod, a pawl carried by the casing'and arranged to vcooperate with said ratchet wheel, an abutment on the sleeve, and an electric switch arranged in the casing and adapted to be connected with a source of electric energy and having portions adapted to be operated by the said abutment on the sleeve.

5. Tn an electromagnetic drill, the combination of a casing, a drill stem extending below the casing, a solenoid arred in the casing, an armature complementary to the solenoid and arranged therein and connected with the stem, a sleeve connected with the said armature and having a square bearing in its upper end, a square twisted rod disposed in the said. bearing, a ratchet wheel on said rod,'avpawl carried by the casing and arranged to cooperate with said ratchet wheel anabutment on the sleeve, and an electmc witch arranged in the casing and adapted to be connected with a source of electric energy and having portions adapted to be operated by the said abutment on the sleeve; the said casing being provided with a stuflin box at its lower end, a shield over the :it' box, box in the casing, and shoes'arred lat.- erally on the lower portion of the casing. In testimony whereof T my go: ture.

. FOREST R, S'lllalla 125. lugs to'secure the shifting 

